Question

how are red blood cell levels and hemoglobin levels related?
○ an increase in red blood cells and hemoglobin will decrease iron.
○ anything that causes an increase or decrease in red blood cells will do the opposite to hemoglobin.
○ anything that causes an increase or decrease in red blood cells will do the same to hemoglobin.
○ anything that causes an increase or decrease in red blood cells will do the same to hemoglobin, but in much smaller amounts.

Explanation:

Hemoglobin is a protein found in red - blood cells. So, an increase or decrease in red - blood cells will result in a corresponding increase or decrease in hemoglobin levels as hemoglobin is contained within red - blood cells.

Answer:

Anything that causes an increase or decrease in red blood cells will do the same to hemoglobin.